Photographic-printing apparatus.



PTENTED AUG:

K PP; L. PPPPP'PAPPRc PHOTOGRAPH@ PPJNPPPG APPAPAPUS.

APPLIATION FILED DEG. 2, 1.905.

SHEETS-SHEET 2.

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d with each-other and wit UNER STATES error.,

WILLlA'M L. BIERBRAUER, 0F HOBOKEN, NEW' JERSEY, ASSliGNOR TO EUGENEDIETZGEN GOMPANLOF CHICAGO, LLlNUlS, A. CGRPO- RA'llON OF lLLlNOlS.

PHoroe'RAPl-uo-Pmmrme appenni-iis..A

nasa/,esa

residing at West Hoboken, in the county of Hudson and State of NewJersey, have invented a certain new and useful Improvement inPhotographic-Printing Apparatus, of

which the following is a specification.

` My invention relates to photographic-printing apparatus commonly knownas blue- -printing apparatus; and the general object of the invention isto provide means for ex-y i oeditiously forcing the backing into' closecontact with the glass pane.

in one well-known type of blue-printing,

frame the contact between the sensitized paper and the tracing isobtained b placing a diaphragm or imperforate blan ret behind thesensitized paper and subsequently exhausting the air from between thediaphragm andthe ane'. AThe pressure of the atmosphere acting upon thebach of the diaphragm thus forces it toward the pane and holds thetracing and sensitized pa er in close'` contact the pane in an apparatusoperating upon this principle it is necessary, oi course, to providesome meansy for preventing the leakage of air from between the diaphragmand the 4pane around the edges of the diaphragm; and the specific objectof` this invention is to provide a frame or marginal rim for thediaphragm for holding down l the edges thereof and advantageous meansfor forcing the said frame or marginal rim toward the pane. i

Part of the object of the invention also is to provide mechanism wherebythe entire side or end of the frame or a considerable part of it may befastened down at a single operation by the movement of a ,singlecontrolling inember. ri`his relieves the operator ofthe necessity ofhaving to go separately to each of the several points of fastening alongthe edge of the frame to fasten the frame down at such points. p p

My apparatus consists of two interfitting i frames, and as contributoryto the main ob ject it is also an object of the invention to providefastening means so constructedv that they will disappear into the outerframe. when in non-active position. This permits'the in' ner frame to bewithdrawn from. the outer 'Specification of Letters Pfatent. ypplicationiled December 2.1905. Seiial'ftoK 290007.

'the operating-handle and ratchet.

Patentes aug., 7. isos.

one without interference from said fastening means..

it is also an object of the invention to provide mechanism whereby thefastening means may be readily set and released and be secure in itsposition when set. v i

li attain my objects by the mechanism illus@ trated in the accompanyingdrawings, in whichi Figures l and 2 are back orbottom. views ofdii'ierent frames embodying my invention.

llhe views are taken from the face opposite to the .one eX osed to thesun' or other source of light during the rinting process. Forconvenience of description this will be referr'ed to as the back side ofthe apparatus.

Fig. i shmvs a double typeof iframe-that is to say, one havingtwooperatingrods on each side, each rod having its' respective handle andthe handles being located at opposite ends of the frame. This frame alsohas a separate operating-rod for each part of the frame. Fig. 2 is asingle and a smaller frame requiring operating-rods at the side only andeach operating-rod extending the entire length of the frame, therebynecessitating but a siigle operating-handle. Fig. 3 is ,an end view ofthe frame looking, in the direction of the arrow at A, Fig. i., andshowing Fig.. 4- is a back view oi a corner of the frame, showing theoperating-handle and ratchet device.`

frame-as, for example, looking in the direction of the arrow at B, Fig.1`showing the operating-.rod in active position upon one of i thecushionesprngs of theinner frame. ilig. 7v is a sectional view taken; oniine 7 7, Fig. i, showing the journai-bearing at the inner end of theoperating-rods in the double type oi device. Fig. 8 is a iace view ofsaid bearing, the

view being taken in the direction of .the arrow C, Fi ."1. ,Fig 9 is aview from the inside of the ame, showing the construction of the cornerand the yrelative locations of the side and end operating-rods, the endrods being elevated above thefside rods for noneinterference with thelatter. Fig. 10 is a fragmentary sectional view illustrating a possibleconstruction of the connection between thediaphragm and the tube throughwhich the 11, the other end being rigidly fastened' by i 'air isexhausted from beneath said diaphragm. Fig. 11 is a'face view ofa-cushion spring, illustrating the slotted construction at the endthereof. f Similar letters refer to similar throughout both views.

Referring first to the simpler type of apparatus shown in Fig. 2, theouter frame conparts sists of walls a, having an inwardly-projectingledge a for supporting the glass pane b. Fitting more or less 'closelywithin said outer frame is an inner frame c, upon the back whereof atfrequent intervals are mounted cushion-springs c. By preference thesesprings are arched flat springs, and in order to enable themto yieldwithout buckling when pressure is exerted upon them from' behind one endhas a slot c2, as shown in Fig.

means of a pin or screw 03. A pin or screw c, having a head wider thansaid slot, penetrates the same and enters into the back of the innerframe, which holds it. By this construction when the spring isstraightenedy under pressure its slotted extremity slides under the headof pin or screw c4; thus enabling the spring to straighten withoutbreaking or tend- -lng to loosen and pull out its fastening devices. Theuse of springs is not essential in this ap aratus; but such springs areuseful in that -t `ey tend to distribute the pressure more evenly overthe frame` and minimizethe effect of unequalities or variations ofadjustment of the members which act upon them. The distance from onespring to another will depend u on the stiffness of the inner frame,

` and in t e case of a small apparatus, vas

shown-in Fig. 2, it ma be unnecessary to provide any springsat t e endsof the frame,

the necessary pressure beingl transmitted from the side' portions of thesame.

vExtending..across the inner frame in'position to lie adjacent 4'to theback. of the glass pane b isadiaphragm d, which may consist ofarubberblanket-'or any fabric which is airproof. Said diaphragm makesair-tight contact with said inner frame, or at least is se,-

cured thereinin such manner as to make airtight connectionv therewithwhen the inner frame-is forced down. upon the backof the glass pane t.l,

The pressure members, which are adapted` j to. act-:upon the back of thesprings c to force whic -theinner frame toward the pane, consist in maynot interfere with the inner frame c gitudinally on the inside and saidrods are mounted Within them, as best shown in Figs.

5 and 9; Besides the recess or rabbet a.6 for the rods e are thevertically-extending recesses or rabbets a2 for receiving said fingers ewhen the latter are rotated to'raised position, as indicated in dottedlines, Figs. 5 and 9.

Rods e are journaled, preferably, in end plates a3 a", which forconvenience may be located on the outside surfaces of the outer frame atthe ends thereof. At the end of rods e outside of the frame is rigidlysecured an operating-handle (Shown in detail in Figs. 3 and 4.) A awl ordog f is pivoted to each of said han les in position to engage the teethof a ratchet plate or quadrant a5, rigidly secured to the 'end plate a4.A springinfluenced latch or finger-piece f is mounted upon said handle fand connected to pawl f to -release the same in the well-known manner.This ratchet .device is so arranged that when the handles and rods e arerotated in direction to lower the fingers e upon springs c the teeth ofthe ratchet will automatically engage pawl f and retain the parts in setposition; vbut when pressure is exerted upon the latch f 2 the pawl willbe released from'the ratchet-teeth andpermit the fingers to be rotatedtoraised-position, as shown in Figs. 5 and 9.

Suitable means for exhausting the air from beneath the diaphragm areindicated in Fig.

10. The diaphragm d is apertured at one or more points, and at suchpoints an eyelet g is secured, each eyelethavingan upwardly-extendingneck g, over which may be slipped a rubber tube h. Said tube will beconnected tol the receiver of an exhaust-pump. The pump is not shown, asit forms no part of the present invention.

. The'double or multiplex type of apparatus illustrated in Fig. l is thesame as that shownzin Fig. 2 and hereinabove described, except thatthere are two operating-rods@ on eachside of the frame andthere is anoperating-rod at each endofthe frame. -This type is: designedforuse-where the frame is so long that axsingle operating-rod would'nothave sufficient resistnace to torsional lstrain to hold all ofitsingers-down tight enough upon the'inner frame. In this multiplex typeitis necessary. to providea journal-bearing for the inner ends of thevoperating-rods where they come together, and such a bearing isillustrated in Fi'g-f8. It consists merely of two plates or journalsi i,secured in proper position in the outer frame.

,When end rods are employed in addition to the side rods, as ,shown inFig. A1, it is necessary to offset them so that one will not interferewith the other where they cross at the corners of the frame. Theserelative positions are illustrated in Figs. 5, 7, and 9.

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- the glass pane is. turned to reverse position tized paper on top ofit, has been laid upon with its back lying upward, as shown in Figs. 1and 2. After the tracing, with the sensithe pane, the diaphragm orblanket d is superimposed and the inner frame c is lowered into positionin the outer frame.

lower the fingers e upon the equalizing or cushion springs c. Suhcientpressure is eX- erted upon the handles to bring the inner frame anddiaphragm down close upon the pane to thereby make air-tight contact atthe periphery of the diaphragm. rlhe air is then exhausted through thetube h, and the atmospheric pressure acting upon the back on outersurface of thediaphragm holds the tracing and sensitized sheet in closecontact with each other and with the glass ane b. The frame is thenturned over and its face exposed to the sun or electric light forprinting, after which the frame is turned back again to the originalposition. The operating-handles f are then released, and the inner frameis lifted out, thus aiiording access to the sensitized paper.

What 1' claim as new, and desire tosecure by Letters Patent, is-

1. Photographic-printing apparatus comprising a glass pane, an openframe adapted tosupport the same, an air-tight diaphragm designed-to lieback of the glass pane, an 1nner 4'frame adapted to lie back of saiddiaphragm, pressure members mounted in said oute'r frame `in position topress upon said inner 4frame toffo'rce the same against said diaphragm,and means for operating a plurality of said pressure members in lunison.

2. Blue-printing apparatus comprising a glass pane, a frame havingledges thereon against which the edges of the glass may lie, a backingadapted to lie back of the glass, an

. operating-rod running along the frame near the edge of the backing,and a plurality of ingers rigidly set on said rod for forcing saidbacking toward the glass.

-3. Blue-printing apparatus comprising a glass pane, an outer framehaving ledges thereon against which the edges of the glass may lie, abacking adaptedto lie back of the glass, a rod running along the framenear the edge of the backing, a handle for operating said rod, and aplurality of ingers'for acting upon said backing, said fingers beingsecured to said rod, whereby all of them are operated from said handle.

4. Blue-printing apparatus comprising' a glass pane7 an outer framehaving ledges thereon against which the edges of the glass may lie, abacking adapted to lie back of the T he han-l .dlesf are then rotated tosuch position as to ed to support said glass, a rod running along theframe near the edge of the backing, a plurality of fingers operativeupon said backing and rigidly set on said rod, ya handle for rotatingsaid rod for operating said/fingers, and a ratchet device for retainingsaid rod in selected position.

5. Blue-printing apparatus comprising a glass pane, a frame havingledges thereon against which the edges of the glass may lie7 an innerframe adapted tolie back of the glass, a rod running parallel with theedge of the frame and extending to the end thereof, a plurality ofiingers mounted on said rod for acting upon said inner frame and ahandle secured tov said rod outside of the outer` frame at the endthereof ifor operating said rod.

6. Blue-printing apparatus comprising a glass pane, an outer framehaving ledges thereon against which the edges of the glass may lie, abacking consisting, of -an inner frame fitting into said outer frame andhaving a blanket extending across it and making air-tight connectiontherewith, a rod running along the outer frame, a plurality of fingers ioperative upon said inner frame and rigidly set upon said rod forforcing said inner frame toward the glass, a handle for rotating saidrod, and means for sired position.

7. ln a blue-printing apparatus'the combination of a glass pane, anouter frame adapted to support said pane, an. inner frame setting saidrod in deadapted to lie back of'said pane, a diaphragm extending acrosssaid inner frame, a rod rotatably mounted in' one-of said frames, aplurality of fingers securedto said rod and adapt- IOO ed to engage theother of said frames for forc- I IIO .ed to engage the other of saidframes for forclng the inner frame toward said pane; a handle forrotating said rodi and a ratchet device for releasably retaining saidrod in set p0sition.

9. In a blue-printing apparatus the combination ofla glass pane, anouter frame adaptane, an inner frame adapted to lie back o' said panewithin said outer frame, a diaphragm'secured to and extending acrosssaid inner frame, a rod rota-4 tably mounted across said outer frame, aplurality of members fastened to said rod for engaging said inner frameto force it toward the pane, a handle for rotating said rod and aratchet device 'lor releasablyretaining said rod in set position.

i0. ln blue-printing apparatus the combination of a glass pane, an outertraine adaptouter frame, a diaphragm secured to and eX- tending acrosssaid lnner frame, springs on the back of said inner frame, a rodrotatably mounted in said outer frame, a plurality of members fastenedto said rod and adapted to abut said springs for forcingthem and theinner frame toward the pane7 vand means for operating said rod. l

l1. Blue printing' ap aratus comprising two intertting frames, t einside frame having a diaphragm and the outside frame having a ledgeacting as a stop against which the inside frame may lie; a rod runninglengthwise of the outside frame, and rotatable about its own axis; and aplurality of fingers secured to said rod for acting upon the insideframe to force it toward the ledge on the outside frame, said rod beinglet into said frame for non-interference with the inner frame-when thelatter is being withdrawn from the outer frame, and said outer framebeing chambered for receiving said fingers when rotated to inactiveposition.

In witness whereof I have hereunto subscribed my name in the presence oftwo witnes'ses.

WILLIAM L. BIERBRAUER. Witnesses:

' RUDOLPH C. BRANDT,

LEO KLOPMAN;

